Rev 21:1-2 Now I saw a new heaven and a new earth, for the first heaven and the first earth had passed away. Also there was no more sea. Then I, John, saw the holy city, New Jerusalem, coming down out of heaven from God, prepared as a bride adorned for her husband.
After the Great White Throne judgment Satan, false prophet and all those with the mark of the beast and also those whose names are not written in the Book of life were found in the Lake of fire for their eternal damnation.
Then God created the New heaven and the New earth. All those in heaven with God the Father will immediately be transferred to the New heaven. This will comprise the heavenly hosts, the bride of the Lamb or sons of God (perfected saints) and other resurrected saints at Rapture (1st resurrection).
All those left behind on earth will also be transferred to the New earth. This will comprise of our Lord Jesus Christ, the resurrected saints, 144,000 Israeli converts and all those whose names were written in the Book of life.
Rev 21:3 And I heard a loud voice from heaven saying, "Behold, the tabernacle of God is with men, and He will dwell with them, and they shall be His people. God Himself will be with them and be their God.
As soon as the New Jerusalem reaches the New Earth, our Lord Jesus with His friends (kings who will rule with Him during His Millennium Rule) will enter Jerusalem to claim the bride for His marriage.
After the marriage, the bride with the Holy Spirit is given the power to invite those worthy in the New Jerusalem to drink from the river of life.
Rev 22:17 And the Spirit and the bride say, "Come!" And let him who hears say, "Come!" And let him who thirsts come. Whoever desires, let him take the water of life freely.
Rev 21:27 But there shall by no means enter it anything that defiles, or causes an abomination or a lie, but only those who are written in the Lamb's Book of Life.
Those whose names are found in the Lamb's Book of Life are His true disciples, who abide in His words.
John 8:31 Then Jesus said to those Jews who believed Him, "If you abide in My word, you are My disciples indeed.
What about the 144,000
Rev 14:5 These are the ones who follow the Lamb wherever He goes. These were redeemed from among men, being firstfruits to God and to the Lamb. And in their mouth was found no deceit, for they are without fault before the throne of God.
These 144,000 are true disciples of our Lord. But they only believed after they have seen Rapture and the One they pierced.
John 20:29 Jesus said to him, "Thomas, because you have seen Me, you have believed. Blessed are those who have not seen and yet have believed."
Heros of Faith
Heb 11:24-26 By faith Moses, when he became of age, refused to be called the son of Pharaoh's daughter, choosing rather to suffer affliction with the people of God than to enjoy the passing pleasures of sin, esteeming the reproach of Christ greater riches than the treasures in Egypt; for he looked to the reward.
Many of the heroes of faith may have their names written in the Lamb's Book of Life.
Heb 11:35, 39-40 Women received their dead raised to life again. Others were tortured, not accepting deliverance, that they might obtain a better resurrection... And all these, having obtained good testimony through faith, did not receive the promise, God having provided something better for us, that they should not be made perfect apart from us.